Electrolytes on Low-Carb / Animal-Based Diets

Bottom Line First:

When you adopt a diet that brings insulin to normal levels regularly, your body flushes out more electrolytes. Replacing them properly prevents what is commonly referred to as “keto flu,” muscle cramps, fatigue, and other issues — and helps you feel your best long-term.

Medical Disclaimer. This information is for educational purposes only and is not medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before making changes to your diet, lifestyle, fasting practices, or medications. Do not stop or change any prescribed treatment without your doctor's guidance. Individual responses vary, and what works for one person may not be safe or effective for another.

What Are Electrolytes?

Electrolytes are minerals that carry an electric charge when dissolved in water. They include sodium, potassium, magnesium, calcium, chloride, bicarbonate, and trace amounts of others like iodine. Your body uses them to transmit nerve signals, contract muscles (including your heart), regulate fluid balance, and maintain proper pH levels.

Electrolytes are necessary regardless of diet — they are essential for every human. The difference on a low-carb or animal-based diet is that your body naturally excretes more of them when insulin normalizes, so you need to be more intentional about replacing them.

Adaptation Phase – Everyone Is Different

There is an adaptation phase when you shift to a diet that brings insulin to normal levels. Some people feel fine within days, while others take 2–4 weeks (or longer) to adjust. How each person adapts is highly individual — it depends on your starting insulin levels, activity, stress, previous diet, and genetics.

General guideline: Start with extra salt on food, bone broth, and electrolyte-rich animal foods. After applying these basics, make small adjustments and see what works for you. Track how you feel — energy, sleep, cramps, and digestion are good clues.

The Main Essential Electrolytes and Where to Get Them from Whole Foods

Focus on bioavailable sources from animal foods — your body absorbs them very efficiently:

Sodium – Controls fluid balance and blood pressure. Best sources: Salted meats, bone broth, seafood, eggs.

Potassium – Works with sodium for nerve and muscle function; important for heart rhythm. Best sources: Salmon, beef, eggs, bone broth, fatty fish.

Magnesium – Supports energy production, muscle relaxation, and sleep. Best sources: Meat, fish, bone broth, eggs.

Calcium – Key for bones and muscle contraction. Best sources: Dairy (if tolerated), bone broth, small fish with bones.

Iodine – An essential nutrient critical for thyroid hormone production (which regulates metabolism, energy, and body temperature) and many other metabolic processes. Animal-based foods can vary in iodine content depending on the soil where animals graze or the iodine in their feed — many modern soils are depleted, so even high-quality meats and eggs may be lower in iodine than in the past. Seafood and shellfish remain excellent sources. Many people on animal-based diets find regular, gentle supplementation beneficial. For more information, see lectures by Dr. Ken Berry and Dr. Elizabeth Bright on YouTube.

How the Body Regulates Electrolytes

Your kidneys, hormones (especially aldosterone and antidiuretic hormone), and parathyroid glands work together to keep levels stable. When insulin normalizes, the body naturally releases stored sodium and you lose more in urine.

What Happens If You’re Deficient

Common signs include fatigue, headaches, dizziness (“keto flu”), muscle cramps, heart palpitations, constipation (see How Digestion Really Works), and poor sleep (see Why Sleep Might Be the Most Underrated Tool).

How Elevated Insulin Affects Electrolyte Retention and Usage

High insulin (common in insulin resistance — see What is Insulin Resistance) tells your kidneys to hold onto sodium (and the water that goes with it). When insulin normalizes, the kidneys let that sodium and water go, and potassium and magnesium can be lost along with them — making replacement important.

Simple Takeaway

Electrolytes are essential no matter what you eat, but when you adopt a diet that brings insulin to normal levels regularly, you need to be more mindful about replacing them. Prioritize real animal foods (seafood, various meats, eggs, bone broth) for highly bioavailable electrolytes. There is an adaptation phase — experiment gently and see what works for your body.

Do some thoughtful research.

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